Re: [Lksctp-developers] Latest source code and avoiding kernel crash

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Hi Vlad!

I see that Wei managed to reproduce it. Thanks!

Best regards
George

On 24/4/2010 4:57 πμ, Vlad Yasevich wrote:
> Attached is what I'll be applying.
>
> -vlad
>
>
> Wei Yongjun wrote:
>    
>>> Hi George
>>>
>>> Could you provide a sample oops backtrace.  I'd like
>>> to capture it in the commit message.
>>>
>>>        
>> Here it is.
>>
>> ------------[ cut here ]------------
>> kernel BUG at kernel/timer.c:790!
>> invalid opcode: 0000 [#1] SMP
>> last sysfs file: /sys/module/ipv6/initstate
>> Modules linked in: sha256_generic sctp libcrc32c ipv6 dm_multipath uinput 8139too i2c_piix4 8139cp mii i2c_core pcspkr virtio_net joydev floppy virtio_blk virtio_pci [last unloaded: scsi_wait_scan]
>>
>> Pid: 0, comm: swapper Not tainted 2.6.34-rc4 #15 /Bochs
>> EIP: 0060:[<c044a2ef>] EFLAGS: 00010286 CPU: 0
>> EIP is at add_timer+0xd/0x1b
>> EAX: cecbab14 EBX: 000000f0 ECX: c0957b1c EDX: 03595cf4
>> ESI: cecba800 EDI: cf276f00 EBP: c0957aa0 ESP: c0957aa0
>>   DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
>> Process swapper (pid: 0, ti=c0956000 task=c0988ba0 task.ti=c0956000)
>> Stack:
>>   c0957ae0 d1851214 c0ab62e4 c0ab5f26 0500ffff 00000004 00000005 00000004
>> <0>  00000000 d18694fd 00000004 1666b892 cecba800 cecba800 c0957b14 00000004
>> <0>  c0957b94 d1851b11 ceda8b00 cecba800 cf276f00 00000001 c0957b14 000000d0
>> Call Trace:
>>   [<d1851214>] ? sctp_side_effects+0x607/0xdfc [sctp]
>>   [<d1851b11>] ? sctp_do_sm+0x108/0x159 [sctp]
>>   [<d1863386>] ? sctp_pname+0x0/0x1d [sctp]
>>   [<d1861a56>] ? sctp_primitive_ASCONF+0x36/0x3b [sctp]
>>   [<d185657c>] ? sctp_process_asconf_ack+0x2a4/0x2d3 [sctp]
>>   [<d184e35c>] ? sctp_sf_do_asconf_ack+0x1dd/0x2b4 [sctp]
>>   [<d1851ac1>] ? sctp_do_sm+0xb8/0x159 [sctp]
>>   [<d1863334>] ? sctp_cname+0x0/0x52 [sctp]
>>   [<d1854377>] ? sctp_assoc_bh_rcv+0xac/0xe1 [sctp]
>>   [<d1858f0f>] ? sctp_inq_push+0x2d/0x30 [sctp]
>>   [<d186329d>] ? sctp_rcv+0x797/0x82e [sctp]
>>   [<c075fa2d>] ? ipv4_confirm+0x117/0x124
>>   [<c072f280>] ? ip_local_deliver_finish+0x0/0x16c
>>   [<c072f280>] ? ip_local_deliver_finish+0x0/0x16c
>>   [<c072f392>] ? ip_local_deliver_finish+0x112/0x16c
>>   [<c072f280>] ? ip_local_deliver_finish+0x0/0x16c
>>   [<c072f429>] ? NF_HOOK.clone.1+0x3d/0x44
>>   [<c072f46e>] ? ip_local_deliver+0x3e/0x44
>>   [<c072f280>] ? ip_local_deliver_finish+0x0/0x16c
>>   [<c072f123>] ? ip_rcv_finish+0x296/0x2be
>>   [<c072ee8d>] ? ip_rcv_finish+0x0/0x2be
>>   [<c072f429>] ? NF_HOOK.clone.1+0x3d/0x44
>>   [<c072f629>] ? ip_rcv+0x1b5/0x1dc
>>   [<c072ee8d>] ? ip_rcv_finish+0x0/0x2be
>>   [<c0708753>] ? netif_receive_skb+0x38a/0x3a5
>>   [<d08a9f44>] ? cp_rx_poll+0x21a/0x326 [8139cp]
>>   [<c070898e>] ? net_rx_action+0x97/0x18d
>>   [<c0443e55>] ? __do_softirq+0xb1/0x157
>>   [<c0443f31>] ? do_softirq+0x36/0x41
>>   [<c044404f>] ? irq_exit+0x2e/0x61
>>   [<c0409df5>] ? do_IRQ+0x8b/0x9f
>>   [<c04090b0>] ? common_interrupt+0x30/0x38
>>   [<c0426298>] ? native_safe_halt+0xa/0xc
>>   [<c040e826>] ? default_idle+0x3f/0x5f
>>   [<c0407d23>] ? cpu_idle+0x96/0xaf
>>   [<c0780e1f>] ? rest_init+0x67/0x69
>>   [<c09e291e>] ? start_kernel+0x34b/0x350
>>   [<c09e20da>] ? i386_start_kernel+0xc9/0xd0
>> Code: 38 00 74 0a 39 50 08 b9 01 00 00 00 74 0c 31 c9 6a 00 e8 61 fe ff ff 89 c1 58 89 c8 c9 c3 55 89 e5 0f 1f 44 00 00 83 38 00 74 04<0f>  0b eb fe 8b 50 08 e8 c0 ff ff ff 5d c3 55 89 e5 0f 1f 44 00
>> EIP: [<c044a2ef>] add_timer+0xd/0x1b SS:ESP 0068:c0957aa0
>> ---[ end trace 7a1b369984a508fe ]---
>> Kernel panic - not syncing: Fatal exception in interrupt
>> Pid: 0, comm: swapper Tainted: G      D    2.6.34-rc4 #15
>> Call Trace:
>>   [<c079271a>] ? printk+0x14/0x1a
>>   [<c0792690>] panic+0x3d/0xb3
>>   [<c079568b>] oops_end+0x97/0xa6
>>   [<c040b0b5>] die+0x58/0x5e
>>   [<c0794f70>] do_trap+0x8e/0xa7
>>   [<c0409775>] ? do_invalid_op+0x0/0x85
>>   [<c04097f0>] do_invalid_op+0x7b/0x85
>>   [<c044a2ef>] ? add_timer+0xd/0x1b
>>   [<c05ac43d>] ? string+0x38/0x8a
>>   [<c05ac43d>] ? string+0x38/0x8a
>>   [<c05ad23d>] ? vsnprintf+0x81/0x24c
>>   [<c045851d>] ? spin_unlock_irqrestore+0xd/0xf
>>   [<c043ecf2>] ? spin_unlock_irqrestore+0xd/0xf
>>   [<c0794d17>] error_code+0x73/0x78
>>   [<d186007b>] ? sctp_getsockopt+0x1af/0xf07 [sctp]
>>   [<c044a2ef>] ? add_timer+0xd/0x1b
>>   [<d1851214>] sctp_side_effects+0x607/0xdfc [sctp]
>>   [<d1851b11>] sctp_do_sm+0x108/0x159 [sctp]
>>   [<d1863386>] ? sctp_pname+0x0/0x1d [sctp]
>>   [<d1861a56>] sctp_primitive_ASCONF+0x36/0x3b [sctp]
>>   [<d185657c>] sctp_process_asconf_ack+0x2a4/0x2d3 [sctp]
>>   [<d184e35c>] sctp_sf_do_asconf_ack+0x1dd/0x2b4 [sctp]
>>   [<d1851ac1>] sctp_do_sm+0xb8/0x159 [sctp]
>>   [<d1863334>] ? sctp_cname+0x0/0x52 [sctp]
>>   [<d1854377>] sctp_assoc_bh_rcv+0xac/0xe1 [sctp]
>>   [<d1858f0f>] sctp_inq_push+0x2d/0x30 [sctp]
>>   [<d186329d>] sctp_rcv+0x797/0x82e [sctp]
>>   [<c075fa2d>] ? ipv4_confirm+0x117/0x124
>>   [<c072f280>] ? ip_local_deliver_finish+0x0/0x16c
>>   [<c072f280>] ? ip_local_deliver_finish+0x0/0x16c
>>   [<c072f392>] ip_local_deliver_finish+0x112/0x16c
>>   [<c072f280>] ? ip_local_deliver_finish+0x0/0x16c
>>   [<c072f429>] NF_HOOK.clone.1+0x3d/0x44
>>   [<c072f46e>] ip_local_deliver+0x3e/0x44
>>   [<c072f280>] ? ip_local_deliver_finish+0x0/0x16c
>>   [<c072f123>] ip_rcv_finish+0x296/0x2be
>>   [<c072ee8d>] ? ip_rcv_finish+0x0/0x2be
>>   [<c072f429>] NF_HOOK.clone.1+0x3d/0x44
>>   [<c072f629>] ip_rcv+0x1b5/0x1dc
>>   [<c072ee8d>] ? ip_rcv_finish+0x0/0x2be
>>   [<c0708753>] netif_receive_skb+0x38a/0x3a5
>>   [<d08a9f44>] cp_rx_poll+0x21a/0x326 [8139cp]
>>   [<c070898e>] net_rx_action+0x97/0x18d
>>   [<c0443e55>] __do_softirq+0xb1/0x157
>>   [<c0443f31>] do_softirq+0x36/0x41
>>   [<c044404f>] irq_exit+0x2e/0x61
>>   [<c0409df5>] do_IRQ+0x8b/0x9f
>>   [<c04090b0>] common_interrupt+0x30/0x38
>>   [<c0426298>] ? native_safe_halt+0xa/0xc
>>   [<c040e826>] default_idle+0x3f/0x5f
>>   [<c0407d23>] cpu_idle+0x96/0xaf
>>   [<c0780e1f>] rest_init+0x67/0x69
>>   [<c09e291e>] start_kernel+0x34b/0x350
>>   [<c09e20da>] i386_start_kernel+0xc9/0xd0
>>
>>
>>      
>>> Thanks
>>> -vlad
>>>
>>> Georgios Cheimonidis wrote:
>>>
>>>        
>>>> Hello!
>>>>
>>>> By reading the archives of the mailing list, I understood that the
>>>> latest source code which includes all the patches can be found at David
>>>> Miller's net-2.6 development tree. I have downloaded and compiled the
>>>> kernel code found there. I am currently doing some tests with the
>>>> dynamic address reconfiguration features of SCTP. The thing is that I am
>>>> facing a problem, not only when using this kernel but many other kernels
>>>> that I have tested so far, including 2.6.31, 2.6.32, 2.6.33.
>>>> Specifically, the kernel crashes (and I have to hard reset the computer)
>>>> when I am trying to set the peer's primary just after adding a new IP
>>>> address to the association, or when I am trying to set the peer's
>>>> primary and then delete an IP address from the association. The only
>>>> solution to my problem so far was to use the patch described here:
>>>> http://sourceforge.net/tracker/?func=detail&aid=2849028&group_id=26529&atid=387570
>>>> <http://sourceforge.net/tracker/?func=detail&aid=2849028&group_id=26529&atid=387570>
>>>> . Using this patch I did not experience any crashes. However, this
>>>> patch, from my understanding, is not included even in the latest source
>>>> code. Is it OK to use this patch together with the latest source code
>>>> from David Miller or there are some compatibility or stability issues?
>>>> If there are any issues with this patch then what could be a solution to
>>>> this problem? In my opinion, this is quite a serious problem, since it
>>>> puts severe limitations on the use of the dynamic address
>>>> reconfiguration features of lksctp.
>>>>
>>>> Thanks in advance,
>>>> George
>>>> ------------------------------------------------------------------------------
>>>> Download Intel&#174; Parallel Studio Eval
>>>> Try the new software tools for yourself. Speed compiling, find bugs
>>>> proactively, and fine-tune applications for parallel performance.
>>>> See why Intel Parallel Studio got high marks during beta.
>>>> http://p.sf.net/sfu/intel-sw-dev
>>>> _______________________________________________
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>>>>
>>>>
>>>>          
>>> ------------------------------------------------------------------------------
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>>>
>>>
>>>        
>>      